Roller chain

Details Roller chain Roller chain

2006-10-17

2006-10-17

Charles, Marcus (Department: 3682)

Endless belt power transmission systems or components

Positive drive belt

Belt formed of rigid links

C474S230000

Reexamination Certificate

active

07121969

ABSTRACT:
In a roller chain, the outside diameters D of the rollers and the outside diameters d of the pins extending through bushings on which the rollers are disposed satisfy the relationships 0.72P≦D≦0.79P and 0.40P≦d≦0.44P where P is the pitch of the roller chain. The height H of the inner plates of the chain satisfies the relationship 0.96P≦H. The elongation ratio of the chain is significantly reduced, and improvements in breaking strength of the pin and in the rotational fatigue of the chain are realized. Consequently wear resistance, strength, and endurance of the chain are significantly improved, making the chain suitable for use as a timing chain in an engine that rotates at high speed.

REFERENCES:
patent: 3011356 (1961-12-01), Bowman
patent: 3054300 (1962-09-01), Bowman
patent: 3448629 (1969-06-01), Pfrank et al.
patent: 4117738 (1978-10-01), McKeon
patent: 4143512 (1979-03-01), Templin
patent: 5382199 (1995-01-01), Ducharme
patent: 5507697 (1996-04-01), Ledvina et al.
patent: 947669 (1964-01-01), None

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